gccrs: Force crash when retrieving meta item location

We still don't know which location should be preferred over the other,
this means that nobody should rely on this function's return value.

gcc/rust/ChangeLog:

	* ast/rust-expr.h: Force crash when retrieving locus.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

diff --git a/gcc/rust/ast/rust-expr.h b/gcc/rust/ast/rust-expr.h
index 239b9511f67f1ef3dc0c658423232d3289798bbf..3c36238c6ee6f40ed49b1e4237243e8ceed3b195 100644 (file)
--- a/gcc/rust/ast/rust-expr.h
+++ b/gcc/rust/ast/rust-expr.h
@@ -298,7 +298,11 @@ public:
   //  we have no idea use which of them, just simply return UNKNOWN_LOCATION
   //  now.
   // Maybe we will figure out when we really need the location in the future.
-  location_t get_locus () const override { return UNKNOWN_LOCATION; }
+  location_t get_locus () const override
+  {
+    rust_unreachable ();
+    return UNKNOWN_LOCATION;
+  }
 
   void accept_vis (ASTVisitor &vis) override;